CN104048821A - Service life test device of pressure reducing valve - Google Patents
Service life test device of pressure reducing valve Download PDFInfo
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- CN104048821A CN104048821A CN201410302332.5A CN201410302332A CN104048821A CN 104048821 A CN104048821 A CN 104048821A CN 201410302332 A CN201410302332 A CN 201410302332A CN 104048821 A CN104048821 A CN 104048821A
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Abstract
The invention discloses a service life test device of a pressure reducing valve. A left pressing oil cylinder and a right pressing oil cylinder which are opposite are designed, the pressing oil cylinders go forwards and backwards to drive a piston and a flange in a reciprocating mode, a left flange end surface and a right flange end surface of the tested pressure reducing valve are sealed, and an axial moving oil cylinder is designed and can move a pressing mechanism in a reciprocating mode to meet the requirement for the length of different structures. As the continuous operating service life test is a long-time fatigue test process, the clamp force can continuously act and is reliable, firm and safe due to the oil cylinder hydraulic pressing mechanism. An energy accumulator and a bidirectional hydraulic water pump are mutually matched to adjust water supply. Pipeline water flows and circulates in the test process, the service life test is carried out on the pressure reducing valve, the pressure of the energy accumulator will slowly decrease due to continuous water supply, when the energy accumulator can not reach a high pressure value required by the test, the bidirectional hydraulic water pump pressurizes the energy accumulator, the pressure is increased and recovered to a rated pressure value, and high pressure water supply stability is guaranteed. When the water pressure of the energy accumulator reaches a set value, the bidirectional hydraulic water pump stops a water injecting motion.
Description
Technical field
The invention belongs to reduction valve field tests, especially relate to a kind of reduction valve life test apparatus.
Background technology
The quality of valve products more and more causes people's attention, and the quality assurance of valve is not only the once check of dispatching from the factory, and more needing is the continuation of long-time safe handling.Particularly more conventional reduction valve in piping system, plays the effect that reduces top hole pressure; It is as the self-contained pressure regulator at a high-low pressure critical point, its performance requirement is strict, substantially be to pack into after pipeline just always in continuous action operation conditions, the pressure of realizing the medium pipelines such as water, steam, oil product regulates, for stable, conveying and control system, brought into play very important effect, be one of indispensable important device in energy transfer pipeline.
Therefore, design can test reduction valve performance and operation life device to standard with improve valve industry standard, improve the product quality of valve, ensure that the safe handling of valve has very important significance.Reduction valve of a great variety, its flange is arranged on the both sides that valve body is relative, and valve body is not of uniform size, and how in mating connection with reduction valve test unit is is fixedly crucial; On the other hand, different reduction valve has different nominal pressures, supplies water stable while how to guarantee to test different vacuum valve, and it is crucial realizing lasting durability test.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reduction valve life test apparatus that different size structure reduction valve are connected and fixed that adapts to is provided.
The present invention is by the following technical solutions: a kind of reduction valve life test apparatus, it is characterized in that: comprise hold-down mechanism and water injecting mechanism, described hold-down mechanism comprises left compressed oil cylinder, right compressed oil cylinder and Shift cylinder, in left compressed oil cylinder, left piston is set, the external part of described left piston connects left supported flange, on described left supported flange, be provided with water inlet, right piston is set in right compressed oil cylinder, the external part of described right piston connects right supported flange, on described right supported flange, be provided with water delivering orifice, between described left compressed oil cylinder and right compressed oil cylinder, reduction valve to be detected is set, described left compressed oil cylinder and right compressed oil cylinder synchronous working are controlled left supported flange and right supported flange compression or are unclamped the turnover flange port of reduction valve, mobile piston on described Shift cylinder connects left compressed oil cylinder, and described right compressed oil cylinder is fixedly installed, left compressed oil cylinder by Shift cylinder axially movable near or away from reduction valve, described water injecting mechanism comprises bidirectional hydraulic water pump, accumulator, waterflood pump, water tank, the first non-return valve and the second non-return valve, described water tank picks out inlet pipeline and outlet pipeline, described bidirectional hydraulic water pump, accumulator, waterflood pump, the first non-return valve and the second non-return valve are positioned on inlet pipeline, described accumulator, the second non-return valve and waterflood pump are connected successively, described bidirectional hydraulic water pump and the series connection of the first non-return valve, and and accumulator, the second non-return valve, waterflood pump is in parallel, the far-end of described inlet pipeline and outlet pipeline is connected respectively water inlet and water delivering orifice, described waterflood pump is to accumulator and reduction valve water filling, when accumulator continues pressure of supply water decline, bidirectional hydraulic pump working is to accumulator charging, when energy storage pressure recovers, bidirectional hydraulic water pump quits work.
As a kind of improvement, on pipeline between the second non-return valve and waterflood pump, pick out a pressure regulation pipeline, the other end of described pressure regulation pipeline connects outlet pipeline, on pressure regulation pipeline, is provided with pressure regulator valve, and described pressure regulator valve is guided outlet pipeline into pressure that inlet pipeline regulates inlet pipeline.
As a kind of improvement, the output terminal of accumulator is provided with import solenoid valve, on described outlet pipeline, be provided with outlet solenoid valve, when the top hole pressure after reduction valve reaches rated range, outlet solenoid valve is opened the closed electromagnetic valve of import simultaneously, when the top hole pressure after reduction valve is less than rated range, outlet closed electromagnetic valve import simultaneously solenoid valve is opened.
As a kind of improvement, the input end of the second non-return valve is provided with waterflood pump water pressure gauge, and the output terminal of described accumulator is provided with the front water pressure gauge of valve.
As a kind of improvement, accumulator is gas-vapor mix accumulator.
As a kind of improvement, left compressed oil cylinder, right compressed oil cylinder, Shift cylinder are connected with respectively a solenoid directional control valve, three solenoid directional control valves are provided with the output oil pipe of two group, article described two, the output oil pipe of a group connects respectively the left and right sides of piston, three solenoid directional control valves switch respectively separately the input channel of oil in the output oil pipe of two group, control the propelling of left piston, right piston, mobile piston or push back.
As a kind of improvement, left compressed oil cylinder, right compressed oil cylinder and the separately output oil pipe between solenoid directional control valve have propelling oil pipe, on described propelling oil pipe, compression oil pressure gauge are set.
As a kind of improvement, also include fuel tank and oil pump, described fuel tank is connected with oil feed line and return line, and described oil pump is arranged on oil feed line, and described oil feed line is connected respectively three solenoid directional control valves with return line.
Beneficial effect of the present invention: reduction valve flange size and structure length are different, the relative compressed oil cylinder in design left and right, by hydraulic jack advance and retreat reciprocal driven plunger and flange, the sealing of the left and right end face of flange of tested reduction valve, design moves axially the oil cylinder hold-down mechanism that reciprocally moves around and meets the requirement of different structure length; Because continuous operating life test is a long torture test process, this oil cylinder hydraulic hold-down mechanism design makes holding force continuous action, reliable firmly safety; By accumulator and bidirectional hydraulic water pump are set, cooperatively interact and regulate to supply water; In process of the test, the circulation of pipeline water flow is carried out durability test to reduction valve, accumulator is due to lasting pressure of supply water meeting slow decreasing, when accumulator does not reach the high pressure values of testing requirements, bidirectional hydraulic water pump, to accumulator charging, makes pressure supercharging return to rated pressure value and guarantees that high service is stable; When accumulator hydraulic pressure reaches setting value, bidirectional hydraulic water pump stops water filling action; Thereby realize steady pressure, supply water, guarantee durability test continue carry out.
Accompanying drawing explanation
Fig. 1 is the structural representation of reduction valve life test apparatus of the present invention.
Fig. 2 is the partial structurtes schematic diagram at hold-down mechanism of the present invention and reduction valve place.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Figure 1, 2, be a kind of specific embodiment of reduction valve life test apparatus of the present invention.This embodiment comprises hold-down mechanism 1 and water injecting mechanism 2, hold-down mechanism 1 comprises left compressed oil cylinder 11, right compressed oil cylinder 12 and Shift cylinder 13, in left compressed oil cylinder 11, left piston 11a is set, the external part of left piston 11a connects left supported flange 11b, on left supported flange 11b, be provided with water inlet 3, right piston 12a is set in right compressed oil cylinder 12, the external part of right piston 12a connects right supported flange 12b, on right supported flange 12b, be provided with water delivering orifice 4, between left compressed oil cylinder 11 and right compressed oil cylinder 12, reduction valve to be detected 5 is set, left compressed oil cylinder 11 and right compressed oil cylinder 12 synchronous workings are controlled left supported flange 11b and right supported flange 12b compression or are unclamped the turnover flange port of reduction valve 5, mobile piston 13a on Shift cylinder 13 connects left compressed oil cylinder 11, and right compressed oil cylinder 12 is fixedly installed, left compressed oil cylinder 11 by Shift cylinder 13 axially movable near or away from reduction valve 5, water injecting mechanism 2 comprises bidirectional hydraulic water pump 21, accumulator 22, waterflood pump 23, water tank 24, the first non-return valve 25 and the second non-return valve 26, water tank 24 picks out inlet pipeline 241 and outlet pipeline 242, bidirectional hydraulic water pump 21, accumulator 22, waterflood pump 23, the first non-return valve 25 and the second non-return valve 26 are positioned on inlet pipeline 241, accumulator 22, the second non-return valve 26 and waterflood pump 23 are connected successively, bidirectional hydraulic water pump 21 and the first non-return valve 25 series connection, and with accumulator 22, the second non-return valve 26, waterflood pump 23 parallel connections, the far-end of inlet pipeline 241 and outlet pipeline 242 is connected respectively water inlet 3 and water delivering orifice 4, waterflood pump 3 is to accumulator 2 and reduction valve 5 water fillings, when accumulator 2 continues pressure of supply water decline, 1 work of bidirectional hydraulic water pump is to accumulator 2 superchargings, when accumulator 2 pressure recover, bidirectional hydraulic water pump 1 quits work.In the present invention, left compressed oil cylinder 11 and right compressed oil cylinder 12 are hydraulic jack, by pass into oil in oil cylinder, left piston 11a and right piston 12a are advanced or are retreated, and are compressed or unclamped the flange port of reduction valve 5 by left supported flange 11b and right supported flange 12b; Left piston 11a and right piston 12a are the structure of two-way push, and a side oil-feed is released piston flange and compressed, and opposite side oil-feed pushes back piston flange and unclamps; Hold-down mechanism 1 fixes reduction valve 5, and by water inlet 3, to reduction valve 5 water fillings, water delivering orifice 4 water outlets, carry out the continuous operation test life-span.For the distance between the left compressed oil cylinder 11 of more flexible control and right compressed oil cylinder 12, be provided with Shift cylinder 13 and adjust moving axially of left compressed oil cylinder 11 integral body, the installation testing needs that adapt to larger reduction valve 5, Shift cylinder 13a is also hydraulic jack and is the structure of two-way push, and the pushing direction of mobile piston 13a is synchronizeed with the pushing direction of left piston 11a.The water circulation of the inlet pipeline 241 that in the present invention, water tank 24 picks out and outlet pipeline 242 implement devices; Before carrying out continuous operating life test, elder generation to accumulator 22 and reduction valve 5 body cavity water fillings, can reduce the working load of test period and bidirectional hydraulic water pump 21 by waterflood pump 23, and guarantees to reach master gauge quota constant-pressure value before valve; In process of the test, when pipeline inner pressure does not reach the high pressure values of testing requirements or accumulator 22 because lasting pressure of supply water can slow decreasing, bidirectional hydraulic water pump 21 is started working to accumulator, and to return to rated pressure value assure feed water stable in 22 superchargings, when the pressure of accumulator 22 reaches setting value, bidirectional hydraulic water pump 21 stops water filling action; Arranging of the first non-return valve 25 and the second non-return valve 26 guarantees that in pipeline, water does not reflux, pressure stability.
As a kind of improved embodiment, on pipeline between the second non-return valve 26 and waterflood pump 23, pick out a pressure regulation pipeline 243, the other end of pressure regulation pipeline 243 connects outlet pipeline 242, on pressure regulation pipeline 243, be provided with pressure regulator valve 27, pressure regulator valve 27 is guided outlet pipeline 242 into pressure that inlet pipeline 241 regulates inlet pipeline 241.Pressure regulator valve 27 is set and water is guided into the inlet pipeline 241 of waterflood pump 23 output terminals from outlet pipeline 242, regulate the top hole pressure of waterflood pump 23, adapt to the reduction valve 5 of low nominal pressure.
As a kind of improved embodiment, the output terminal of accumulator 22 is provided with import solenoid valve 3a, on outlet pipeline 242, be provided with outlet solenoid valve 4a, import solenoid valve 3a and outlet solenoid valve 4a cooperatively interact out and close, when the top hole pressure after reduction valve 5 reaches rated range, outlet solenoid valve 4a opens the solenoid valve of import simultaneously 3a and closes, when the top hole pressure after reduction valve 5 is less than rated range, outlet solenoid valve 4a closes the solenoid valve of import simultaneously 3a and opens, thereby dynamic adjustments pipeline makes pressure in rated range.
As a kind of improved embodiment, the input end of the second non-return valve 26 is provided with waterflood pump water pressure gauge 6, and the output terminal of accumulator 22 is provided with the front water pressure gauge 7 of valve.Waterflood pump water pressure gauge 6 is for monitoring the top hole pressure of waterflood pump 23, and when waterflood pump water pressure gauge 6 arrives setting value, waterflood pump 23, by out of service, facilitate tester to observe and monitors; Before valve, water pressure gauge 7, for monitoring the pressure of accumulator 22, is convenient to the cooperation adjustment of bidirectional hydraulic water pump 21.
As a kind of improved embodiment, accumulator 22 is gas-vapor mix accumulator.Owing to adopting the accumulator of gas-vapor mix, utilize the large feature of the compressible expansion coefficient of gas, make accumulator 22 inside can accumulate the water yield to a certain degree, reduce the startup frequency of bidirectional hydraulic water pump 21, thereby reduce its working load.
As a kind of improved embodiment, left compressed oil cylinder 11, right compressed oil cylinder 12, Shift cylinder 13 are connected with respectively a solenoid directional control valve 1a, three solenoid directional control valve 1a are provided with the output oil pipe of two group, article two, the output oil pipe of a group connects respectively the left and right sides of piston, three solenoid directional control valve 1a switch respectively separately the input channel of oil in the output oil pipe of two group, control the propelling of left piston 11a, right piston 12a, mobile piston 13a or push back.Three each freely solenoid directional control valve 1a controls that match of oil cylinder, make its synchronous working complete the conversion of oil circuit, switch the output oil pipe of two group separately, realize and when a side oil-feed, release piston flange compression, during opposite side oil-feed, push back piston flange and unclamp, the piston synchronous action in each oil cylinder realizes the compression of reduction valve 5 and unclamps.
As a kind of improved embodiment, left compressed oil cylinder 11, right compressed oil cylinder 12 and the separately output oil pipe between solenoid directional control valve 1a have the oil pipe of propelling 1b, advance on oil pipe 1b and arrange and compress oil pressure gauge 1c.
Left compressed oil cylinder 11 and right compressed oil cylinder 12 are during from the flange of two side compression reduction valve 5, the size cases of oil pressure is most important to sealing effectiveness, by being set at propelling oil pipe 1b place, compression oil pressure gauge 1c make tester observe intuitively pressure condition, guarantee that left compressed oil cylinder 11 and right compressed oil cylinder 12 have enough holding forces reduction valve 5 is clamped to sealing, if there is the situation that pressure changes, tester can make adjustment in time.
As a kind of improved embodiment, also include fuel tank 8 and oil pump 9, fuel tank 8 is connected with oil feed line 81 and return line 82, and oil pump 9 is arranged on oil feed line 81, and oil feed line 81 is connected respectively three solenoid directional control valve 1a with return line 82.Fuel tank 8 and oil pump 9 pass through three solenoid directional control valve 1a difference compressed oil cylinder 11, right compressed oil cylinder 12, Shift cylinder 13 fuel feeding left, and realize oily periodic duty by oil feed line 81 and return line 82.
Claims (9)
1. a reduction valve life test apparatus, it is characterized in that: comprise hold-down mechanism (1) and water injecting mechanism (2), described hold-down mechanism (1) comprises left compressed oil cylinder (11), right compressed oil cylinder (12) and Shift cylinder (13), left piston (11a) is set in left compressed oil cylinder (11), the external part of described left piston (11a) connects left supported flange (11b), on described left supported flange (11b), be provided with water inlet (3), right piston (12a) is set in right compressed oil cylinder (12), the external part of described right piston (12a) connects right supported flange (12b), on described right supported flange (12b), be provided with water delivering orifice (4), between described left compressed oil cylinder (11) and right compressed oil cylinder (12), reduction valve to be detected (5) is set, described left compressed oil cylinder (11) and right compressed oil cylinder (12) synchronous working are controlled the turnover flange port that left supported flange (11b) and right supported flange (12b) compressed or unclamped reduction valve (5), mobile piston (13a) on described Shift cylinder (13) connects left compressed oil cylinder (11), described right compressed oil cylinder (12) is fixedly installed, left compressed oil cylinder (11) by Shift cylinder (13) axially movable near or away from reduction valve (5), described water injecting mechanism (2) comprises bidirectional hydraulic water pump (21), accumulator (22), waterflood pump (23), water tank (24), the first non-return valve (25) and the second non-return valve (26), described water tank (24) picks out inlet pipeline (241) and outlet pipeline (242), described bidirectional hydraulic water pump (21), accumulator (22), waterflood pump (23), the first non-return valve (25) and the second non-return valve (26) are positioned on inlet pipeline (241), described accumulator (22), the second non-return valve (26) and waterflood pump (23) are connected successively, described bidirectional hydraulic water pump (21) and the first non-return valve (25) series connection, and with accumulator (22), the second non-return valve (26), waterflood pump (23) parallel connection, the far-end of described inlet pipeline (241) and outlet pipeline (242) is connected respectively water inlet (3) and water delivering orifice (4), described waterflood pump (23) is to accumulator (22) and reduction valve (5) water filling, when accumulator (22) continues pressure of supply water decline, bidirectional hydraulic water pump (21) work is to accumulator (22) supercharging, when accumulator (22) pressure recovers, bidirectional hydraulic water pump (21) quits work.
2. a kind of reduction valve life test apparatus according to claim 1, it is characterized in that picking out a pressure regulation pipeline (243) on the pipeline between described the second non-return valve (26) and waterflood pump (23), the other end of described pressure regulation pipeline (243) connects outlet pipeline (242), on pressure regulation pipeline (243), be provided with pressure regulator valve (27), described pressure regulator valve (27) is guided outlet pipeline (242) into pressure that inlet pipeline (241) regulates inlet pipeline (241).
3. a kind of reduction valve life test apparatus according to claim 2, the output terminal that it is characterized in that described accumulator (22) is provided with import solenoid valve (3a), on described outlet pipeline (242), be provided with outlet solenoid valve (4a), when the top hole pressure after reduction valve (5) reaches rated range, outlet solenoid valve (4a) opens import solenoid valve (3a) simultaneously and cuts out, when the top hole pressure after reduction valve (5) is less than rated range, outlet solenoid valve (4a) cuts out import solenoid valve (3a) simultaneously and opens.
4. a kind of reduction valve life test apparatus according to claim 3, the input end that it is characterized in that described the second non-return valve (26) is provided with waterflood pump water pressure gauge (6), and the output terminal of described accumulator (22) is provided with the front water pressure gauge (7) of valve.
5. a kind of reduction valve life test apparatus according to claim 4, is characterized in that described accumulator (22) is gas-vapor mix accumulator.
6. according to a kind of reduction valve life test apparatus described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that described left compressed oil cylinder (11), right compressed oil cylinder (12), Shift cylinder (13) is connected with respectively a solenoid directional control valve (1a), three solenoid directional control valves (1a) are provided with the output oil pipe of two group, article described two, the output oil pipe of a group connects respectively the left and right sides of piston, three solenoid directional control valves (1a) switch respectively separately the input channel of oil in the output oil pipe of two group, control left piston (11a), right piston (12a), the propelling of mobile piston (13a) or push back.
7. a kind of reduction valve life test apparatus according to claim 6, it is characterized in that described left compressed oil cylinder (11), right compressed oil cylinder (12) and separately the output oil pipe between solenoid directional control valve (1a) there is propelling oil pipe (1b), on described propelling oil pipe (1b), arrange and compress oil pressure gauge (1c).
8. a kind of reduction valve life test apparatus according to claim 6, it is characterized in that also including fuel tank (8) and oil pump (9), described fuel tank (8) is connected with oil feed line (81) and return line (82), it is upper that described oil pump (9) is arranged on oil feed line (81), and described oil feed line (81) is connected respectively three solenoid directional control valves (1a) with return line (82).
9. a kind of reduction valve life test apparatus according to claim 7, it is characterized in that also including fuel tank (8) and oil pump (9), described fuel tank (8) is connected with oil feed line (81) and return line (82), it is upper that described oil pump (9) is arranged on oil feed line (81), and described oil feed line (81) is connected respectively three solenoid directional control valves (1a) with return line (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302332.5A CN104048821B (en) | 2014-06-27 | 2014-06-27 | A kind of pressure-reducing valve life test apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302332.5A CN104048821B (en) | 2014-06-27 | 2014-06-27 | A kind of pressure-reducing valve life test apparatus |
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| CN104048821A true CN104048821A (en) | 2014-09-17 |
| CN104048821B CN104048821B (en) | 2016-05-11 |
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| CN201410302332.5A Expired - Fee Related CN104048821B (en) | 2014-06-27 | 2014-06-27 | A kind of pressure-reducing valve life test apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111256982A (en) * | 2020-03-10 | 2020-06-09 | 山东省产品质量检验研究院 | Multifunctional fire valve body test device |
| CN112197953A (en) * | 2020-09-30 | 2021-01-08 | 北京润世安能科技开发有限公司 | Pressure reducing valve off-line adjusting device |
| CN115575105A (en) * | 2022-09-23 | 2023-01-06 | 河南省锅炉压力容器安全检测研究院 | Pressure-bearing testing device of pressure valve |
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| CN115575105A (en) * | 2022-09-23 | 2023-01-06 | 河南省锅炉压力容器安全检测研究院 | Pressure-bearing testing device of pressure valve |
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| CN104048821B (en) | 2016-05-11 |
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Inventor after: Chen Jingmiao Inventor after: Wang Yixiang Inventor after: Liu Qiang Inventor after: Lin Mei Inventor after: Wu Jiandong Inventor after: Chen Qun Inventor before: Lin Mei Inventor before: Chen Jingmiao Inventor before: Wang Yixiang Inventor before: Wu Jiandong Inventor before: Chen Qun |
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